<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*body{background:url(../images/rule.png) top left;*/
        /*    background-size:100%;}*/
        body{
            background:url(rule.png);
            background-size:100%;
        }
    </style>
</head>
<body>
    <a href="/">首页</a>
</body>
</html>